王伟佳, 熊江勇, 张国锋, 赵铭, 尚琼. 页岩气井连续油管辅助压裂试气技术[J]. 石油钻探技术, 2015, 43(5): 88-93. DOI: 10.11911/syztjs.201505015
引用本文: 王伟佳, 熊江勇, 张国锋, 赵铭, 尚琼. 页岩气井连续油管辅助压裂试气技术[J]. 石油钻探技术, 2015, 43(5): 88-93. DOI: 10.11911/syztjs.201505015
Wang Weijia, Xiong Jiangyong, Zhang Guofeng, Zhao Ming, Shang Qiong. Auxiliary Fracturing and Testing of Gas in Shale Gas Well with Coiled Tubing[J]. Petroleum Drilling Techniques, 2015, 43(5): 88-93. DOI: 10.11911/syztjs.201505015
Citation: Wang Weijia, Xiong Jiangyong, Zhang Guofeng, Zhao Ming, Shang Qiong. Auxiliary Fracturing and Testing of Gas in Shale Gas Well with Coiled Tubing[J]. Petroleum Drilling Techniques, 2015, 43(5): 88-93. DOI: 10.11911/syztjs.201505015

页岩气井连续油管辅助压裂试气技术

Auxiliary Fracturing and Testing of Gas in Shale Gas Well with Coiled Tubing

  • 摘要: 目前国内页岩气开发中已普遍使用连续油管,但使用中连续油管挤毁、变形、自锁、钻磨效率低和井下工具遇卡、落井等问题时有发生。针对这些问题,对国内外相关技术与理论进行了调研分析,选取了高性能小尺寸的井下工具复合式连接器、防脱式螺杆钻具、五翼凹底磨鞋、水力振荡器和打捞加速器等,并通过不断改进施工工艺,形成了适合国内页岩气开发的连续油管铺助压裂试气集成技术,包括长水平段连续油管下桥塞技术、长水平段连续油管钻复合桥塞技术、长水平段连续油管射孔技术和长水平段连续油管打捞冲砂技术等。现场应用表明,应用上述集成技术后,单只桥塞的纯钻塞时间由70 min缩短至40 min,单井钻塞周期由9 d缩短至5 d,桥塞钻除率由97%升至100%;射孔时未发生油管挤毁现象;打捞一次成功率及连续油管坐封桥塞一次成功率均达到100%。研究表明,该集成技术可有效提高页岩气井压裂试气成功率。

     

    Abstract: Coiled tubing has been widely used in shale gas development in China, there have been significant difficulties, such as tubing collapse, deformation, self-locking, low efficiency in drilling and milling, getting stuck and falling into the hole. Aiming to mitigate or eliminate these problems, relative analysis and technical investigation have been conducted at home and abroad, especially by using the high performance compound connector with small size, anti-drop PDM, five-blade concave mill, hydraulic oscillator and fishing accelerator, a integrated coiled tubing technology for supplementary fracturing and gas testing has been formed in shale gas development, including plug setting in long horizontal section, a drilling bridge plug, perforating, fishing and sand washing in an extended horizontal well. Field application demonstrated that by using the new techniques, the time of drilling one plug was reduced from 70 min to 40 min, the drilling plug cycle in a well reduced from 9 days to 5 days, drilling and removing rate of plugs raised from 97% to 100%, tubing collapse has not happened in perforating, the success rate of fishing and setting plug reached to 100%. All in all, the practice showed that the integrated technology could improve the success rate of fracturing and gas testing in shale gas wells.

     

/

返回文章
返回